Roll polisher



May 1, 1934. 'M. L. HUNKER El AL ROLL POLI SHER 2 Sheets-Sheet l MLHlZiz/w/ JMM'ZZW Filed July 50, 1952 y M. HUNKER ET AL 1,956,953

ROLL POLISHER Filed July 30, 1952 2 Sheets-Sheet 2 V A x MMzl/er Patented May l, 1934;

earner or ies Appiication July 30, 1932, Serial No. 626,284

13 Claims.

The invention relates to roll polishers, and and to continuously polish the rolls during the more particularly to a polishing apparatus for maintaining true and polished surfaces upon the rolls of a rolling mill, such as is ordinarily used for the rolling of steel sheets, and the like, during the operation of the mill.

An object of the improvement is to provide a roll polisher comprising a pair of horizontal, slidable rods, a polishing block upon each rod adapted to be reciprocated over the surface of the adjacent roll, and a reversing gear for reciprocating said rods and including a double rack bar and a mutilated gear.

Another object is to provide a sliding rod upon which one polishing block is mounted, and a tube rotatable upon said rod and carrying another polisher block, each block being independently adjustable, to compensate for any diiferences in the thickness, or wear upon the blocks.

A still further object of the improvement is to provide a polishing block swiveled upon an axis at right angles to the reciprocating rod, whereby the polishing block may automatically adjust i"- self to the usual slightly concaved contour of the Working face of the roll.

The above, together with other objects which will be apparent from an inspection of the accompanying drawings, and a reading of the following detail description, may be attained by constructing the invention as disclosed herein.

A preferred embodiment of the invention is illustrated in the drawings, in which Figure 1 is a front elevation of a conventional rolling mill showing the improved roll polisher applied thereto;

Fig. 2, an enlarged end elevation of the rolls and a portion of the housing of the mill, showing the relative position of the polishing apparatus;

Fig. 3, an enlarged, transverse sectional view through one of the reciprocating rods and the tube rotatably mounted thereon;

Fig. 4, an enlarged transverse sectional View through one of the holders and" polishing blocks, showing the swivel mounting of the same upon the reciprocating rod; and

Fig. 5, a similar, fragmentary sectional View showing the swivel mounting of one of the block holders upon the reciprocating tube.

Similar numerals refer to similar parts throughout the drawings.

The housings of a rolling mill are shown conventionally at 1o, and the upper and lower rolls at 11 and 12 respectively. improved roll polishing apparatus to which the invention pertains is arranged to be attached to the mill operation of the mill without interfering with the regular operation of the mill.

The driving and operating mechanism for this polishing apparatus may be mounted upon a support indicated at 13 located at one side of the rolling mill. A motor 14 may constitute the driving means and the shaft 15 thereof may be connected, through the reduction gearing, shown generally at 15, the shaft 17 of the mutilated driving pinion 18.

ihis pinion is adapted to continuously reciprocate the double rack frame 19 provided with the upper and lower rack bars 20 and 20a adapted to be alternately engaged by the teeth 21 of the mutilated gear.

The upper and lower horizontal rods 22 and 2211 project beyond the ends of the rolls 11 and 12 and are connected at their ends to the adjacent end of the rack bar frame 19 and are slidably located through the guide bearings 23 mounted upon the housings 10 of the mill, whereby the rods 22 and 22a may be continuously reciprocated, adjacent to the rolls 11 and 12 respectively, by the operation of the rack bar frame 19.

A polishing block 24 is carried by each of the reciprocating rods, being mounted thereon by the block holders 25 which are preferably swiveled upon the rods as by the pins 26, located at right angles to the rods. Set screws 27 may be provided for detachably securing the polishing blocks within the holders 25. One polishing block is adapted to be held in contact with each roll by means of angular tension arms 28, which are fixed upon the projecting ends of the reciprocating rods and drawn toward each other by the tension spring 29, which may be adjusted by the nut 30 mounted upon the threaded end 31 of the spring. As the spring 29 draws the tension arms 28 toward each other, the reciprocating rods 22 and 22a will be slightly rotated oppositely and in the proper directions to urge the polishing blocks into contact with the rolls. Regardless of the contour of the rolls, the spring 29, through the tension arms 28, will automatically adjust the polishing blocks so as to hold them in frictional engagement with the rolls throughout the entire operation of the apparatus, thus compensating for any unevenness in the surfaces of the rolls.

For the purpose of supporting the rack frame 19, the tracks 32 are fixed upon the frame and located upon opposite sides of the gear shaft 17, upon which the tracks ride as the frame is reciprocated.

.It is preferable to provide two polishing blocks upon each reciprocating rod so that each block operates on slightly more than half of the surface of the adjacent roll. However, it has been found that by providing two spaced polishing blocks upon the same rod, the surface of the roll is frequently ground or polished unevenly, due to unevenness in wearing of the two polishing blocks. To compensate for this difference in the polishing blocks, a tube 33 may be mounted upon the projecting end of each of the reciprocating rods, said tubes being held against longitudinal movement with reference to the rods while permitted to rotate to a limited extent upon the rods. This may be accomplished by providing a transverse slot 34 in each tube which receives a pin 35 carried by the rod. Each of the tubes 33 has a block holder 25 swiveled thereon, as at 26, in which is mounted a polishing block such as illustrated and described in connection with the rods 22 and 22a.

A tension arm 28, similar to the tension arms upon the reciprocating rods, is mounted upon each of the tubes 33 and connected by a tension spring 29 of the same construction as described in connection with said reciprocating rods. With this construction it will be seen that the polishing blocks carried by the tubes will be adjusted independently of the polishing blocks fixed upon the reciprocating rods, whereby each set of polishing blocks will be held in frictional contact with the surfaces of the rolls independently of the other set of blocks, and regardless of any difference in thickness or wear in the blocks.

The swivel mountings of the polishing block holders upon the reciprocating rods and tubes will permit each of the polishing blocks to automatically adjust itself to the usual slightly concaved contour of the Working surface of the roll, so as to evenly and uniformly polish the entire working surface of each roll.

It will be seen that by the reciprocation of the rods 22 and 22a and the tubes 33 carried thereby, the polishing block upon each reciprocating r'od will polish substantially one-half of the surface of the corresponding roll, while the polishing block upon each tube will polish substantially the other half of the surface of the adjacent roll.

As illustrated in Fig. 1, each polishing block will travel slightly past the center of the corresponding roll so as not to form a ridge at the center of the roll.

It will be seen that the polishing blocks are located a sufficient distance upon each side of the pinch of the rolls so as not to obstruct the passage of sheets and the like being rolled in the mill.

In the operation of the polishing mechanism, the motor 14 may be operated continuously, or for as much of the time as desired, during the operation of the mill, the mutilated or intermittent gear 18 rotating in the direction of the arrow shown in Fig. l, engaging the lower rack bar 20a to move the rods to the left, as viewed in Fig. 1, moving the polishing blocks upon the tubes 33 from the right-hand end to a point slightly beyond the center of the rolls and at the same time moving the polishing blocks upon the reciprocating rods themselves from the position shown in Fig. l to the left-hand end of the rolls, thus covering the entire surface of the rolls with each full reciprocation of the rods in one direction.

As the teeth 21 upon the mutilated or intermittent gear pass out of engagement with the lower rack bar 20a they will engage the upper rack bar 20 to reciprocate the rods, and tubes carried thereby, toward the right, as viewed in Fig. 1, returning the polishing blocks to the position shown in said figure.

We claim:

1. In combination with a rotatable roll, apparatus for polishing said roll including a reciprocating rod adjacent to the surface of the roll, a polishing block fixed upon the rod, a second polishing block rotatable upon the rod, means for rotatably moving the rod to hold the first named polishing block in frictional contact with the surface of the roll, and means for rotatably moving the second polishing block upon the rod to hold said second block in frictional contact with the surface of the roll.

2. In combination with a rotatable roll, apparatus for polishing said roll including a reciprocating rod adjacent to the surface of the roll, a polishing block fixed upon the rod, a tube rotatably mounted upon the rod, a second polishing block fixed upon the tube, means for rotatably moving the rod to hold the first named polishing block in frictional contact with the surface of the roll, and means for rotatably moving the tube upon the rod for holding the second named polishing block in frictional contact with the surface of the roll.

3. In combination with a rotatable roll, apparatus for polishing said roll including a reciprocating rod adjacent to the surface of the roll, a polishingblock fixed upon the rod, a second polishing block rotatable upon the rod, spring means for rotatably moving the rod to hold the first named polishing block in frictional contact with the surface of the roll, and spring means for rotatably moving the second polishing block upon the rod to hold said second block in frictional contact with the surface of the roll.

4. In combination with a rotatable roll, apparatus for polishing said roll including a reciprocating rod adjacent to the surface of the roll, a polishing block fixed upon the rod, a tube rotatably mounted upon the rod, a second polishing block fixed upon the tube, spring means for rotatably moving the rod to hold the first named polishing block in frictional contact with the surface of the roll, and spring means for rotatably moving the tube upon the rod for holding the second named polishing block in frictional contact with the surface of the roll.

5. In combination with a rolling mill including housings and two cooperating rolls journaled therein, apparatus for polishing said rolls including a pair of rods slidably mounted upon said housings, a polishing block fixed upon each rod, means for rotatably moving the rods to hold one of said polishing blocks in frictional contact with each roll, a second polishing block rotatably mounted upon each rod, and means for rotatably moving said second named polishing blocks upon the rods for holding one of the second named polishing blocks in frictional contact with the surface of each roll.

6. In combination with a rolling mill including housings and two cooperating rolls journaled therein, apparatus for polishing said rolls including a pair of rods slidably mounted upon said housings, a polishing block fixed upon each rod, spring means for rotatably moving the rods to hold one of said polishing blocks in frictional contact with each roll, a second polishing block rotatably mounted upon each rod, and spring means for rotatably moving said second named polishing blocks upon the rods for holding one of the second named polishing blocks in frictional contact with the surface of each roll.

7. In combination with a rolling mill including housings and two cooperating rolls journaled therein, apparatus for polishing said rolls including a pair of rods slidably mounted upon said housings, a polishing block fixed upon each rod, an angular arm upon each rod and a tension spring connected to'said arms for frictionally holding each polishing block in frictional contact with one of the rolls, a tube rotatably mounted upon each rod, a polishing block fixed upon each tube, an angular arm upon each tube V and a second tension spring connecting said last named angular arms for holding each of the second named polishing blocks in frictional contact with one of the rolls.

8. In combination with a rotatable roll, apparatus for polishing the working surface of the roll including a reciprocating rod adjacent to said surface of the roll, and a polishing block swiveled upon an axis at right angles to said rod and frictionally engaging the working surface of the roll.

9. In combination with a rotatable roll, apparatus for polishing the working surface of the roll including a reciprocating rod adjacent to said surface of the roll, and two spaced polishing blocks independently swiveled upon axes at right angles to the rod and frictionally engaging the working surface of the roll.

10. In combination with a rotatable roll, apparatus for polishing the working surface of the roll including a reciprocating rod adjacent to said surface of the roll, and two spaced polishing blocks independently swiveled upon axes at right angles to the rod and independent spring means for holding each block in frictional contact with the surface of the roll.

11. In combination with a rotatable roll, apparatus for polishing the working surface of the roll including a reciprocating rod adjacent to said surface of the roll, a polishing block swiveled upon an axis at right angles to the rod, a tube rotatably mounted upon the rod, a second polishing block swiveled upon an axis at right angles to the tube, means for rotatably moving the rod to hold the first named block in frictional contact with said surface of the roll, and means for rotatably moving the tube upon said rod for frictionally holding the second named block in frictional contact with said surface of the roll.

12. In combination with a rotatable roll, apparatus for polishing said roll including a reciprocating rod adjacent to the surface of the roll and having one end projecting beyond the end of the roll, two spaced polishing blocks carried by the rod, and independent means operatively associated with the projecting end of the rod for automatically urging each block in frictional contact with the surface of the roll.

13. In combination with a rotatable roll, apparatus for polishing said roll including a reciprocating rod adjacent to the surface of the roll and having one end projecting beyond the end of the roll, two spaced polishing blocks carried by the rod, and independent spring means operatively associated with the projecting end of the rod for automatically urging each block in frictional contact with the surface of the roll.

MARTIN L. HUNKER. JOHN M. MILLER. 

